On Thu 22-08-13 17:03:16, Andy Lutomirski wrote: > Writes via mmap currently update mtime and ctime in ->page_mkwrite. > This hurts both throughput and latency. In workloads that dirty a > large number of mmapped pages, ->page_mkwrite can be hot and > file_update_time is slow and scales poorly. Updating timestamps can > also sleep, which hurts latency for real-time workloads. It would help to make your case if you posted the latency comparison before & after the patchset in this introductory email. We can then see how significant is the reduction of latency... Honza -- Jan Kara <jack@xxxxxxx> SUSE Labs, CR -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
